Method of shaping nut-blanks.



P. H. MGCAIN.

METHOD OF SHAING NUT BLANKS.

APPLICATION FILED DB0. 13, 1909. RENBWED 00T. 2z. 1913.

1,087,313, Patented Feb. 17, 1914. I

l l 2 SHEETS-SHEET 1.

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Zi i@ A giiiiiilii n- COLUMBIA PLANQGRAPH Cc., WASHINGTON. D. C,

P. H. MOCAIN.

METHOD OF SHAPING NUT BLANES. APPLICATION FILED DEG. 13, 1909. RENEWED 00T. 22, 1913.

1,087,313,v Patented Feb. 17, 1914. l

2 SHEETS-SHEET 2.

UNITED STATES refrnn'r orrion.

:PAUL H. MCCAIN, OI"Y CHICAGO, ILLINOIS, ASSIGNOR T0 PHEOLL MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

METHOD 0F SHAPING NUT-BLANKS.

Specification of Letters Patent.

Patented ret. ir, i914..

Application filed December 13, 1909, Serial No. 532,782. Renewed October 22, 1913. Serial No. 796,728.

T0 all whom it may concern Be it known that I, PAUL H. MCCAIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Methods of Shaping Nut-Blanks, of which the following is a specification.

This invention relates to improvements in nut making machines and more particularly to the method of shaping nut blanks and the primary object of the invention is to provide an improved method of chamfering or shaping the edges of angularly shaped nuts by submitting the nut blanks to an edgewise rolling movement between shaping dies to compress the edges of the blank.

A further object is to provide an improved method which will be simple and inexpensive and effective and efficient in operation.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty which appear in the following specification and claims in connection with the accompanying drawing in which Figure 1 is a front elevation of an apparatus by means of which this improved method may be carried into operation. Fig. 2 is a detail sectional view taken on line 2 2 of Fig. 1. Fig. 3 is a detail sectional view taken on line 3 3 of Fig. 1. Fig. -t is a detail sectional view taken on line 1 1 of Fig. 1. Fig. 5 is a sectional view taken on line 5 5 of Fig. 7 Fig. 6 is a. side elevation of Fig. 1. Fig. 7 is a detail sectional view of another form of apparatus for carrying this improved method into operation. Fig. 8 is a sectional view of a partially formed nut blank. Fig. 9 is a view similar to Fig. 8 of a complete nut blank. Fig. 10 is a detail view of the face of one of the shaping dies, showing the increasing width of the groove.

The accompanying drawings illustrate an apparatus which has been found eiiicient in carrying into operation this improved method but it is to be understood that any suitable apparatus capable of performing or carrying into effect this improved method may be employed.

' In the drawings, the numeral 10 designates a rotary die which is preferably in the form of a disk as shown and is secured to a tudinal adjustment on the shaft 11 prefere` ably by means of a collar 13 which is threaded upon the adjacent extremity of the shaft 11. This sliaft 11 is j ournaled in suitable spaced bearings 14- provided on a suitable support '15 and a collar or sleeve 16 surrounds the shaft between the bearings 11V and substantially fills the space. This collar 16 may be secured to the shaft 11 by means of any suitable Vfastening device .so that the shaft will be held against longitudinal adjustment in its bearings.

Motion may be imparted to the shaft 1l in any desired'or suitable manner preferably by means of a pulley 17k which is secured to the shaft so that when the pulley is rotated, the shaft 11 and the die 10 will be likewise rotated. The die l0 is provided in its Y periphery with a circumferential groove 18 which opens through the periphery of the die. The base of this groove 18 tapers toward the center of the die 10 as at 19 to form a reduced portion between the peripheral walls at the base of the groove. The groove 1S may be of any desired depth according to the diameter of the nut blanks to be shaped and cooperating 'with the die 10 is a fixed die designated generally by the reference numeral 20. This die 2O is pref# erably of a semi-circular formation and is adapted to partially surround the periphery .of the die 10 and is provided with a groove 21 opening through the face thereof adjacent the periphery of the die 10. This groove 21 is also provided with a tapering bottom 22 similar in construction to the tapering bottom 19 of the groove 1S. The die 20 is so arranged that the groove 21 therein will register with the groove 18 in the die 10 and the die 20 is supported and held in position in any desired or suitable manner preferably by means of clips 2:3 which engage and rest against a supporting face 24 of the support 15. These clips are adapted to engage the face of the die 20 and are themselves removably held in posiporting face 24. A stop 26 may also be provided which projects from the .face of the support 2a and against which stop one end of the die 2O rests so that the die will be properly positioned with respect to the rotary die 10. p

Suitable adjusting devices 27 such as screws or t-he like may be provided and these adjusting devices pass through suitable supports 28 which are secured to the Supporting face 24 and by means of which the die 2O may be positioned.

The groove 21 in the die 20 is preferably of a uniform size from the lower end or the end which engages the stop 2G to a point substantially midway of its length and from which point the width of the groove increases to the other or receiving end of the die 20 as shown at 29 in Fig. 10.

lWhen the die 2O is placed in position, it is preferably so adjusted with respect to the rotary die that a nut blank being fed between the rotary die and the die 2O will not receive any degree of compression until the nut blank is advanced to the point from which the size of the groove 21 increases. By increasing the width of the groove 20,

the nut blank will be properly positioned by I the increased width of the groove so that it will enter between the dies 10 and 2O at the point where the compression is first exerted upon the blank, in the proper position thereby insuring a properly shaped nut blank when the latter is ejected from the machine.

rlhe nut blanks may be fed tonthis apparatus in any desired or suitable manner such as by means of a chute 30, the lower portion of the face of which is preferably formed by means of a plate 31 removably secured in position by any suitable fastening means. rlhe chute 80 is so arranged that the nut blanks will be discharged therefrom into the space between the inner edge of the die and the die 10 and a slot 32 may be provided in the plate by means of which the operator may readily inspect the manner in which the nut blanks are being fed to the shaping apparatus and to permit him to straighten the nutblanks in the chute so that they will feed properly.

ln carrying this improved method into operation with the apparatus thus described the operation will be as follows: As the nut blanks are delivered from the chute they will fall upon the periphery of the rotary die 10 that is they will fall edgewise into the peripheral groove 18 of the die 10. As the die 10 is rotated it will carry the nut blank thus received forwardly, which movement will cause the portion o-f the nut which extends beyond the periphery of the die 10 to project into the groove 21 of the die 20 until ther nut blank becomes wedged or jammed between the bottoms of these cooperating grooves. A further rotation of the die 10 in the same direction will tend to roll the nut blank edgewise and this rolling movement will cause the peripheral edges of the nut blank to be forced into the tapering bottoms 19 and Q2 of the grooves 18 and 2O owing to the fact that the distance between the bottoms of the grooves 18 and 21 decreases from a point substantially midway of the length of the die 20 to the lower extremity of the latter die. As the nut blank is thus being rolled, the peripheral edges as at 84, (see Fig. 8) will be compressed which will chamfer the edges of the nut. This compression and ro-lling of the nut blank will tend to slightly increase the diameter of the nut, by forcing the material from the edges of the nut into the body portion thereof.

If desired and in order to prevent the formation of rounded edges 35 between the adjacent faces of the nut blank, the die 10 may be provided at the bottom of the groove 18 with spaced faces 36 adjoining each other and separated by notches or depressions 37 so that when the nut blank is being given its edgewise rotation and compression, to form the chamfered edges 34;, the material which would otherwise have a tendency to form projecting aortions 38 on the nut blank, as shown in IFig. 8, will be compressed and forced into the concave portion 85 to form substantially flat edges 39.

Any suitable means may be provided for forming the spaced faces 36 and notches 37 in the bottom of the groove 18 and for this purpose a perfectly formed nut blank may be provided which blank may be constructed of material somewhat harder or denser than the material of which the dies 10 is constructed so that when this nut blank is fed to the die 1() and forced by the die through the groove 21 in the die 20, it will be rolled in the same manner as all of the nut blanks but instead of the tapered portions of the grooves acting upon this blank to chamfer or shape the same the corners of this blank will be forced into the bottom o-f the groove 18 to form the notches or depressions 37 while the faces on the nut blank will roll over the portions which have the spaced faces 86. After this nut blank has been discharged from the lower extremity of the die 20, the nut blank to be chamfered or shaped may then be fed from the chute 8O to the dies. Asl these nut blanks are fed forwardly by the die 10, they will rotate edgewise and will be compressed, the material at the extremities of the corners of the blank between the adjacent faces, will be successively forced into the notches or depressions 37 between the faces 36 to form a substantially flat corner. VWhile these extremities of the corners are thus being forced into the body of the material, the faces of the nut blank will roll over the respective faces 36,

lrotation of the nut blank as it passes between the dies being accomplished by friction exerted upon the nut blank by the dies.

Vhat is claimed as new is 1. The method of chamfering angularlyV shaped nut blanks which consists in imparting a rolling movement to the blank and compressing the edges of the blank during the rolling movement.

2. The method of chamfering angularly i shaped nut blanks which consists in rolling the blanks edgewise and simultaneously compressing the edges of the blank.

3. The method of chamfering angularly shaped nut blanks which consists in continuouslyrolling the Vblanks edgewise in one direction and compressing the edges of the blank.

et. The method of chamfering angularly shaped nut blanks which consists in rolling the blanks edgewise and exerting pressure upon the peripheral edges of the faces of the blank to gradually flatten the edges.

5..'l`he method of chamfering angularly shaped nut blanks which consists in forcing the blanks between cooperating dies to laterally compress only the peripheral edges of the faces of the blank by the movement of one of the dies, and continuously rotating the blank edgewise during its passage between the dies by frictional engagement of the moving die with the blank and compressing the peripheral edge of the blank between the compressed portions of the faces of the nut and in a direction transversely with respect to the direction of the compressing action upon the peripheral edges of the faces.

6. The method of chamfering angularly shaped nut blanks which consists in imparting an edgewise rotation to the blank and forcing the blank while being rotated between cooperating shaping dies to exert a pressure upon the peripheral edges of the faces of the blank to Hatten the edges and shape the corners of the blank between adjacent faces.

7. The method of chamfering angularly shaped nut blanks which consists in compressing only the peripheral edges of the faces of the blank by forcing the blank between co-operating shaping dies, and imparting motion to one of the dies to further force the blank between the dies and to rotate the blank edgewise while passing between the dies.

8. The methodv of chamfering angularly shaped nut blanks which consists in compressing only the peripheral edges of the faces of the blankby forcing the blank between cooperating shaping dies, and imparting motion to one of the dies to further force the blank between the dies, and to continuously rotate the blank edgewise while passing between the dies.

9. The method of chamfering angularlyshaped nut blanks which consists in forcing the blanks between cooperating shaping dies to compress only the peripheral edges of the faces of the blank by the movement of one of the dies, and continuously rotating the blank during its passage between the dies by the frictional engagement of the' moving die with the blank.

l0. The method of chamfering and shaping angularly shaped nut blanks which con sists in feeding the blanks between shaped dies and rolling the blanks during their passage between the dies to simultaneously chamfer the peripheral edges of the faces of the blank and shape the corners between the peripheral faces of the blank.

, l1. The method of chamfering and shaping angularly shaped nut blanks which consists in feeding the blanks between a single pair of shaped dies by imparting motion to one of the dies to continuously rotate the blank edgewise during its passage between the dies by the frictio-nal engagement of one of the dies with the blank to gradually compress the peripheral edges of the faces of the blank and shape the corners between the peripheral faces of the blank.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 30th day of November A. D. 1909.

PAUL H. MGCAIN.

Vitnesses:

J. H. JOCHUM, Jr., C. H. SEEK.

Copie: o! this patent may be obtained for ve cents each, by addressing the Commissioner ot Patents, Washington, D. C. 

